Veterinary-file holder.



S. B. DUNN. VETERINARY PIL HOLDER.

APPLICATION FILED JULY 2, 1909.

Patented Dec. 16, 1913.

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SOLA B. DUNN, OF CHICAGO, ILLINOIS.

VETERINARY-FILE HOLDER.

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Application led July 2, 1909.

To all whom it may concern Be it known that I, SOLA B. DUNII, a citi- Zen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Veterinary-File Holders, of which the following is a full, clear, and exact specification.

This invention relates to improvements 1n veterinary file holders, the les for which are employed for filing down the molar teeth of horses and other animals, and for the practical use of which the holder must -be adapted for removable files and must be rigidly held by a handle several times longer than the length of the le to enable the filing down of the molars by a movement of the file lengthwise of the molar rows.

The object of my invention is a means by which files of a given length may be held against movement in a holder in the absence of a clamping pressure, and at most a mm1- mum clamping pressure, which holder and locking means are also adapted for locking therein files of greater length than t-he holder by means of the same locking devices, exerting a pressure on a line lateral to the file and holder and whereby such a holder and locking devices are adapted for holding against possible movement files substantially diering in length.

With these ends in view, my invention finds embodiment in certain features of novelty in the construction, combination and arrangement of parts by which the said objects and certain other objects are hereinafter attained, all as fully described with reference to the accompanying drawings, and more particularly pointed out in the claims.

In said drawings z-Figure 1 illustrates a plan view of a veterinary file holder and locking device therefor embodying my invention. Fig. 2 is a longitudinal section thereof. Fig. 3 is a similar view illustrating the adaptability of my invention to files differing in length and of substantially greater length than is shown in Figs. 1 and 2; and, Fig. 4 is a transverse section on the line 4--4 of Fig. 1.

Similar characters of reference indicate the same parts in the several figures of the drawings.

5 indicates a file holder provided at one end with a flange 7 forming an abutment for Specification of Letters Patent.

Patented Dec. 16, 1913.

Serial No. 505,544.

a file 8 and with longitudinal flanges 9 overlapping the side edges of a file, said holder being provided with a shank 6 lying in a plane with or below the face of the holder whereby a lile may be slipped over the shank into its operative position against said end fiange and the side flanges of the holder. The shank is provided with a recess 10 in which is confined a cam like pawl 11 pivoted upon a pin or rivet 12. The shank 6 of the hoLer is screw threaded to receive corresponding screw threads 13 on a handle rod 14 to the free end of which is secured a hand grasp 15, the opposite end of the rod 14 being disposed on a line in a plane slightly above the pivotal point of the cam like pawl. rIlhe pawl 11 is curved on its face adjacent the end of the rod 14 so when swung forwardly by the action of the rod it will slide freely against the same, and the ease of this sliding movement may be promoted by rounding the end of the rod as indicated at 16.

In operation, when desired to use a file substantially corresponding with the length of the holder, the rod is unscrewed until the pawl is moved or falls by gravity to a plane below the under side of the file which is then inserted as before described and the rod screwed up until the pawl rests against the adjacent end of the file, either with or without the pawl exerting any pressure against the end thereof, for it will be understood that with the forward end of the lile impinging against the lug 7 of the holder and the pawl so close to the opposite end, there can be no longitudinal movement of the flle because of the effectual resistance thereto of the rod due to its screw threaded bearing and the fact that its contact with the pawl is but slight above the pivot thereof. When it is desired to use or substitute for the file 8 a substantially longer file 17 (see Fig. 3), the handle is withdrawn from the shank until the pawl lies in a plane below the bottom face of the le, and then after the file is inserted in the holder, with its end bearing against the lug 7, the rod is screwed up sufliciently for the pawl to bear and exert a pressure against the under face of the file and at a right angle to its length, and as a result wedge the file between the forward end of the side flanges of the holder and the face or bottom of the file holder, and as such pressure by the pawl is at a right angle to the direction of the pressure exerted against the pawl by the holder in moving it to its upward position against the file 17, it will be locked in the holder against any possibility of an accidental movement and until the handle is unscrewed from the socket sufliciently for the pawl to move 0r be moved from engagement with the file.

Having described my invention, what l claim and desire to secure by Letters Patent of the United States is 1. A veterinary file holder comprising in combination a holder for the le provided with an end flange and side flanges, a shank therefor, a screw threaded rod adjustable in said shank, and a swinging locking device, the axis of which is at a right angle to the axis of the rod below the saine and in the rear of the inner end of the side flanges, substantially as described.

2. A veterinary file holder comprising in combination a holder for the file provided with an end flange and side flanges, a screw threaded rodv adjustable in the holder, a pivoted pawl between the end of said rod and adjacent end of the flanged holder, the axis of which pawl is at a right angle to that of the rod below the same and in the rear of the inner end of the side flanges, substantially as described.

3. A veterinary file holding implement comprising in combination a file holder open at one end, means for confining a file inserted therein against a lateral movement in either direction and a longitudinal move! ment in one direction, a handle rod screwed into the shank of said holder and a pivoted pawl interposed between said rod and the open end of the holder, the pivot of said pawl being bodily in a plane below the file supporting surface of the holder and of the axis of said rod, substantially as described.

l. A veterinary file holder `device coinprising in combination a file holder, means for retaining a file supported by the holder against a lateral movement, and also an endwise movement in one direction, a rearwardly projecting shank forl said holder, a handle rod screwed therein and adapted to be'projected into said recess, and a piv 1 oted locking device the axis of which is in a plane below the holder and the axis of said rod whereby when the locking device is moved to a position opposing the end of a file supported by the holder the handle rod serves to maintain said device in its locking position and a file against accidental movement, substantially as described.

5. A veterinary file holder device comprising-in combination a file holder, means 'limiting the lateral movement and an endwise movement in one direction of a file inserted therein, a shank for said holder provided with a recess, a handle rod screwed into said shank and adapted to be projected into said recess, a locking pawl pivoted in said recess in a plane below said handle, said pawl being provided with a curved sur face opposing the end of said handle rod whereby the pawl has a shifting bearing on the handle rod throughout the movement of the pawl, substantially as described.

ln witness whereof', I have hereunto set my hand and affixed my seal, this 29th day Of June A. D. 1909.

SOLA B. DUNN. [Ls] l/Vitnesses;

F. E. BRoM, J. H. MoELnoY.

Copies of this patent may be obtained for ve cents each, by adressing the Commissioner of Patents, Washington, D. C. 

